Basically once you had their DLL you have to referance it to your project.

Make a instance of that progressbar object

ProgressBar1 As Farside.WebControls.ProgressBar - in VB.net

Farside.WebControls.ProgressBar ProgressBar1 - C#

next you can assign those standard properties which ever you want.
Adjust your calculations according to your and assign the value
You basically have to use animate1 - you can see this when you had installed their demo.
They got millisecounds and value property which you can assign.